Refrigeration apparatus



Aug. 11, 1931. H. E. WlLLSlE REFRIGERATION APPARATUS Filed Oct. 13, 1926 w 9 I a z a M a 2 J i Z 1 fl I n 2 w a. 1 z 4 w a a 7 4 2 m :7 NE L A Patented Aug. 11, 1931 UNITED STATES PATENT OFFICE HENRY E. WILLSIE, OF NEW YORK, N. Y., ASSIGNOR TO THE UNION TRUST COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO I,

REFRIGERATION APPARATUS Application filed October 13, 1926. Serial No. 141,414.

My invention relates to the so-called intermittent absorption refrigeration apparatus, and the operation of the apparatus has been described in patents issued to me.

The object of this invention is to provide automatic means for draining liquor from the evaporator.

I attain this object by the means illustrated in the accompanying drawings, in which Fig. l is a diagrammatic view of the entire apparatus showing the draining device arranged to drain liquor from the evaporator during the heating period; and Fig. 2, a partial view of the apparatus showing the dralning device arranged to drain a measured quantity of liquor from the evaporator during the heating period.

Similar characters refer to similar parts.

The operation is as follows: The still-absorber 10 is partly filled with aqua ammonia, called liquor, which when heated, as by gas flames 11, drives ammonia gas and some steam thru pipe 12 into the trap 13 in which liquor is collected to the level of the topof pipe 14. The pressure of ammonia gas forms a liquor leg or column in pipe 15 and the gas thus forced to pass thru pipe 16 raises the steel balls 17, 18 from their seats allowing liquor in the evaporator 19 to drain-into the trap 13 and then back to'the still. The gas then passes thru pipe 20 into the condenser 21 which is submerged in the cooling water tank 22. When sufficient ammonia has been liquefied the heating of the still is stopped which then cools enough to reduce its pressure and thus the liquid ammonia isforced K from the condenser 21 thru pipe 20 into the evaporator 19. The passage of gas thru pipe" R eferring to Fig. 2, the same arrangement is used except thata container 24 is placed at the lower end of the drain pipe 16.- The pipe 15 leads up and down to the lower part of the container 2 1. A pipe 25 leads from the lower part of the container 24 to the top of the evaporator 19. During the heating period gas from the pipe 15 raises a liquor leg in pipe 25 and passing up through pipe 16 opens check valve ball 18 allowing the container 24 to nearly fill with liquid. Then no more liquid will drain from the evapora- .tor. During.the absorption cycle liquor in the container 24 above the end of pipe 15 therein will be returned to trap 13. By this arrangement the quantity of liquid drained from the evaporator is limited by the capacity of the container above the end of pipe 15.

Pipe 20 leads to the condenser 21 in a water tank 22.

It is obvious that check valves may be put in pipes 15 and 25 having functions similar .to the liquor legs, and that pipe 15 may con- 2. In the combination of a still-absorber,

evaporator and condenser connected together, a drain pipe connecting to the bottom of the evaporator adapted to drain liquid from the evaporator toward the still-absorberfa contaiuer in communication with said drain pipe, a check valve in said drain pipe, and automatic means for opening said check vvalve during the heating of the still-absorber.

3. In the combination of a still-absorber, evaporator and condenser connected together, a drain pipe adapted to drain liquid from the evaporator tow'ardthe still-absorben'a container in communication with saiddrain pipe adapted to limit the quantity of liquid drained from the evaporator, a check valve in said drain pipe, and means for opening evaporator toward the still absorber, a check i said check valve by the fiow of gas from the valve in said drain pipe, and means for opening said check valve by the flow of gas from the still-absorber. I

6. In the combination of a still-absorber, evaporator and condenser connected together, a drain pipe adapted to drain liquid from the evaporator towards the still-absorber, check valves in said drain pipe, and automatic means for opening said check valves during the heating of the still-absorber.

7 A refrigerating apparatus comprising a still-absorber, evaporator and condenser connected together, a trap, an inverted returnbent pipe connected at one end to saidtrap' and at its other end to said still-absorber,

means to return liquor from said trap to said still-absorber, a drain from said evaporator to said trap, a pipe connecting said trap and said evaporator arranged to cause the gas to flow through said drain when the still-absorber is being heated'while serving as a return connection during the reverse operation of said apparatus, and means in said drain operable by the flow of gas therethrough to cause draining of the liquor fromsaid evaporator during the heating period and to prevent movement of gas through said drain "during said reverse operation.

sorber, said means being controlled by the How of gas to said evaporator during the' heating period of said still-absorber and arranged to cause draining of said evaporator during said period.

Signed at Cleveland, in the county of Guyahoga and State of Ohio this 25 day of September, A. D. 1926.

' HENRY E. WILLSIE.

8. A refrigerating apparatus comprising a still-absorber, a trap, an evaporator and a condenser connected in anpperative cycle and including a plurality of pipes connected in parallelism between said trap and evaporator, one of said pipes being connected to said evaporator at a point substantially above the other and being connected to said trap to maintain a column of liquid in sai-dpipe so that gas will flow from said still-absorber through the other of said pipes during the heating period of said still-absorber, and automatically operating means to prevent'the How of gas through said last namedpipe during the reverse operation of said apparatus.

9. A refrigerating apparatus comprising a still-absorber, an evaporator and a condenser connected in an operative cycle, and including a liquor drain for said evaporator provided with means to prevent the reverse fiow of gas from said evaporator toward said still-abpun 

